Device for filling centrifugal casting machines



' May 15,1 923.

' W. H. 'MILLSPAUGH DEYICH on FILLING CENTRIFUGAL CASTINGMACHINBIS Original Filed Jan. 16, 1912 INVENTOR WILLIAM H. MILLSPAUGH.

ATTORNEY Reissued May 15, 1923.

UNITED STATES PATENT OFFICE.

WILLIAM H. MILLSPAUGH, F SANDIISKY, OHIO, .ASSIGNOR TO THE SANDUSKY FOUNDRY & MACHINE COMPANY, OF SANDUSKY, OHIO, A CORPORATION OF OHIO.

DEVICE FOR FILLING CENTRIFUGAL CASTING MACHINES.

Original No. 1,047,972, dated December 24, 1912, Serial No. 671,457, filed January 16, 1912. Application for reissue filed October 4, 1921.

T 0 (ZZZ whom it may concern:

Be it known that I, \VILLIAM H. llIiLLs- IAUGH, a citizen of the United States of America, and a resident of the city of San- I dusky, county of Erie, and State of Ohio,

have invented certain-new and useful Improvements in Devices for Filling Centrifugal Casting Machines, of which the following is a specification. reference being had to the accompanying drawings, forming a part thereof.

My inventionrelates to a device for feeding molten metal to centrifugal casting machines.

The object of the invention is to provide a devicefor holding a large supply of molten metal in a position to be quickly dumped into a centrifugal casting machine in which the resulting casting is to be of small internal diameter but having comparatively thick walls, thus necessitating the introduction of a large amount of molten metal through a feed pipe or trough of com paratively small diameter.

I will describe my invention in the following specification and point out the novel features thereof in ,the appended claims.

In the accompanying drawing, Fig. 1 is acentral longitudinal section, with parts in elevation. of one embodiment of the invention. Fig. 2 is a transverse vertical section taken on the line 2-2 of Fig.1. Fig. 3 is a similar view taken on the line 3- 3 of Fig. 1. Figure 4 is a side elevation 36 of a modified form of trough. I

Like characters of reference designate corresponding arts in all of the figures.

As illustrate in the drawing the centrifugal casting machine comprises a cylinder 10', rotatabl, mounted on rolls 12, journaled in suitable theends-of the cylinder.- The cylinder .10 is surrounded intermediate its length by a gear 18 which is adapted to be in driving relation with any suitable source of power to enable the. cylinder to be rotated at a high rate of speed. The internal configuration of the cylinder, which in this instance acts as a mold, may be of any deearings 14, 16 in proximity to Serial No. 506,306.

sired shape. As illustrated, the cylinder is shaped to cast a pipe having flanges at each end formed in the annular recesses 20, 22. The ends of the cylinder 10, are provided with plates. 24, 26, which may be bolted thereto, or held by clamps. not shown. These end plates have a comparatively small central hole therethrough so that the machine is adapted to cast a'pipe having a comparatively small internal diameter but with thick walls.

To introduce the molten metal into the cylinder I provide a dumper or feeder. In its preferred embodiment it comprises a trough 30, preferably made in the form of a circular pipe closed at one end 31 and communicating at its other end with a reservoir 32v to be hereinafter described, said trough having a longitudinal opening or slot 34 along one of its sides. The slot 34 is preferably of substantially the same length as the distance between the inner faces of the end plates 24, 26 on the cylinder with journals 36, 38 rotatable in bearings 40 and-42, respectively. A hand wheel 44 is provided at one end by means ofwhich the dumper may be turned to discharge its contents into the cylinder. The dumper in the preferred form shown is also arranged to be moved longitudinally in and out of the cylinder 10, and for this reason its journals 36 and 38 are elongated.

It has been found in practice that. when a pipe is to be cast having a small internal diameter and thick walls, it is impossible to hold enough metal in-a plain trough open throughout its length and of sufliciently small diameterto enter the pipe which is to be cast. Consequently in one form of the invention I have provided a reservoir 32 which is in. communication with the trough 30 but located'outside of the cylinder 10. This reservoinis preferably bolted to the 'open end of the trough 30, and with the major portion of its capacity below its axis of rotation. If desired it may be cast integrally therewith. The open side of the trough 30 may be closed at each end at.46,

The dumper is provided at its ends a removable plug 49.

48. fora short distance so that the length of the slot 34 is substantially equal to internal length of the cylinder 10.

With the dumper in the position shown in full lines in Fig. 1 the molten metal may be introduced either through the exposed end of the open slot 34, or through a feed hole, in the top of reservoir 32, fitted with The trough 30 and reservoir 32 having been filled the longitudinal movement of the dumper to the position shown in dotted lines, brings the same into position for the discharge of the metal into the mold: If no longitudinal movement of the dumper in the casting operation is necessary or desired, the dumper may be filled through the feed hole in the reservoir only, and during the filling and dumping operation may remain in the position shown in dotted lines.

A modified form of feeding device is shown in Fig. 4.- which comprises a long trough 50, of substantially the same crosssection as that shown in Fig. 2, and provided with an elongated slot or discharge openin "52 in oneside thereof, which is substantia ly the same length as that of the article which is to be cast. In order to provide suflicient capacity in the trough for holdin a large volume of metal within a small iameter, I extend the trough atone or both ends beyond the limits of .the dis-- charge opening 52, so that the portions 54 and 56 of the trough are closed.

Trunnions and shafts 58 and 60 are provided at the ends of the trough so that it maybe rotated, and, if desired, to provide for longitudinal movement as explained above.

In using the device the desired amount of molten metal ma be poured into the dumper through a feed ole, in the top and at one end.thereof, fitted with a removable plug 49; or, if desired, the dumper may be moved longitudinally and the metal through the exposed end of the s poured in ot. After it has been filled the dumper, being in position within the rapidly rotating cylinder, may be turned and its contents poured out through the discharge slot.

, What I claim is; i i

1. A filling device for centrifugal casting machines comprising a closed trough arranged to be rotated andhaving a discharge opening through one side thereof shorter than the trough and through which the molten metal is discharged intothe interior of the machine and having a feed hole, longitudinally spaced from the discharge open-' ing, the trough being closed between the feed ho e and discharge opening.

2. A filling device for centrifugal casting machines,--'comprising an elongated trough arranged to be rotated and provided with an elongated discharge opening through one side thereof, said trough being closed beyond the ends of said opening to provide a large capacity with comparatively small diameter.

3. A hollow rotary-member, a filling trough arranged to be rotated in said memher, and a reservoir communicating-With said trough and rotatable therewith.

4. A hollow rotary member, a. filling trough arranged to hold molten metal and provided with a discharge opening in one side ofsubstantially the interior length of said member, and a closed reservoir communicatingwith said trough.

5. A hollow .rota member, a filling trough rotatably and s idably supported projecting into said member and provided in one side with a discharge opening of substantially the length of the casting to be made, and a reservoir communicating with said trough and movable therewith.

6. A hollow rotary cylinder of comparatively large diameter having one of its ends fitted With a plate having a central hole of comparatively small diameter, a filling trough rotatably supported and extending through the hole in said plate,'and a reservoir communicating with said trough and rotatable therewith. v

7. A dumper for centrifugal cast-ing ma chines, comprising a trough rotatably and slidably mounted and having an elongated discharge opening in one side thereof, and

a closed reservoir communicating with said trough and movable therewith.

8. A dumper for supplying molten metal to a centrifugal casting machine, comprising a rotatable cylindrical trough open along one side, and a reservoir communicating with said trough, said reservoir having the major portion of its capacity below the axis of rotation when it isin position to be filled.

9. In combination, a filling device for cen trifugal casting machines comprising a closed trough arranged to be rotated andhaving a discharge opening through one side thereof which is shorter than the trough and through which the molten metal is disnycombination, a filling device for centrifugal casting machines comprising a closed trough arranged to be rotated and having a discharge opening through one side thereof which is shorter than the trough and through which the molten metal is discharged into the interior of the machine, said trough having a discharge opening through one side thereof shorter than the trough and through which the metal is discharged into the interior of the machine and having a feed hole longitudinally spaced 10 from the discharge opening, and a, rotatable cylinder, the trou h being rotatably supported and inverti 1e in said cylinder and extending through one end of the cylinder.

In witness whereof, I have hereunto set 15 my hand this 29 day of September, 1921.

WILLIAM H. MILLSPAUGH. 

